JPWO2020116322A1 - Valve device - Google Patents

Abstract

Provided is a valve device capable of reducing pressure loss. The valve body 4 having communication holes 45B and 45C communicating the valve chamber 43, the inflow outlets 44B and 44C and the valve chamber 43 and the inflow outlets 44B and 44C, and the valve body 4 in which the valve body 42 is arranged, and the communication holes 45B are arranged. It includes a rectifying member 5. The communication hole 45B has a refracting portion 46a in which the center line of the communication hole 45B is refracted, and the rectifying member 5 is arranged in the refracting portion 46a and is bent or curved from an inner peripheral surface larger than the angle of the refracting portion 46a. It has a corner portion 52.

Description

The present invention relates to a valve device having a refracted flow path.

The valve device includes, for example, a block-shaped valve body made of an aluminum alloy, and the flow path is switched by bringing the valve body arranged inside the valve body into contact with the valve seat. That is, a flow path through which a fluid flows is formed inside the valve body. Then, this flow path is formed by cutting a block-shaped valve body.

Japanese Unexamined Patent Publication No. 2011-89732

In the cutting process, the block-shaped valve body is cut straight with a drill or the like. Therefore, when forming a plurality of flow paths, it is necessary to cut the valve bodies at different positions as the base ends and join the flow paths inside the valve body.

Since the cutting is performed on a straight line, the place where the flow paths meet each other becomes a refracted flow path, which may cause a loss of pressure for pushing out the fluid.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a valve device capable of reducing pressure loss.

In order to solve the above problems, the valve device of the present invention has a valve chamber in which a valve body is arranged, an inflow port, a valve body having a communication hole for communicating the valve chamber and the inflow outlet, and a valve body having a communication hole in the communication hole. The communication hole includes an arranged rectifying member, and the communication hole has a refracting portion in which the center line of the communication hole is refracted. It is characterized by having a corner portion composed of a greatly refracted or curved inner peripheral surface.

The refracting portion may have a refracting angle of 90 degrees. At least two refracting portions may be provided, the two refracting portions may be arranged continuously, and the rectifying member may be arranged over the two refracting portions. The valve body may have a recess, and the rectifying member may have a fitting portion to be fitted into the fitting portion and further include a detent member to be inserted into the recess.

A pipe provided outside the valve body and having a curved shape may be further provided, and the pipe may communicate with the communication hole. Further provided with a joint mounting portion that is separate from the valve body, the pipe is connected to the joint mounting portion on the side opposite to the end portion connected to the valve body, and the joint mounting portion is fixed to the valve body. It may have been done.

The pipe may be brazed to the valve body and the joint mounting portion and connected to each of them. The material of the pipe and the material of the valve body may be the same.

According to the present invention, it is possible to obtain a valve device capable of reducing pressure loss.

It is a front sectional view of the valve device which concerns on 1st Embodiment. First, it is a side sectional view of the valve device according to the embodiment. It is (a) perspective view and (b) sectional view of the rectifying member which concerns on 1st Embodiment. It is a front sectional view of the valve device which concerns on 2nd Embodiment. It is a schematic diagram of the fluid flowing in the inner circumference of a rectifying member. It is (a) perspective view, (b) plan view, (c) bottom view, (d) right side view, (e) left side view of the rectifying member. It is (a) perspective view and (b) sectional view of the detent member. It is a front sectional view of the valve device which concerns on 3rd Embodiment. It is sectional drawing of the inner peripheral shape of the rectifying member of another embodiment.

(First Embodiment)
The valve device according to the first embodiment will be described with reference to the drawings. FIG. 1 is a front sectional view of the valve device according to the first embodiment. FIG. 2 is a side sectional view of the valve device according to the first embodiment. The description indicating the vertical direction in the present specification refers to the vertical direction when the drawing is viewed, and does not refer to the direction when the valve device is actually arranged. As shown in FIGS. 1 and 2, the valve device 1 includes a can 2, a stator member 3, and a valve body 4.

The can 2 has a bottomed cylindrical shape having a cup-shaped shape in which one end surface is closed hemispherically. The can 2 is a container that houses a drive mechanism that moves the valve shaft 41, which will be described later, in the axis X direction. A rotor member is housed inside the can 2. The can 2 is fixed to a screw 62 as a holder for fixing the drive mechanism by welding. A male screw portion is formed on the lower side of the portion of the screw 62 fixed to the can 2, and a sealing member for sealing is arranged between the fixed portion and the male screw. A female screw that is screwed with the male screw of the screw 62 is formed inside the opening on the upper surface of the valve body 4, and the screw 62 is fixed to the valve body by screwing the screw 62 into the opening on the upper surface of the valve body 4. doing.

The stator member 3 is fitted on the outer circumference of the can 2. The stator member 3 has a coil. This coil receives power via the lead wire. The stator member 3 constitutes a stepping motor together with a rotor member housed inside the can 2. This stepping motor serves as a drive source for moving the valve shaft 41.

The valve body 4 has a block shape made of a material such as an aluminum alloy. The valve body 4 has a valve shaft 41, a valve body 42, a valve chamber 43, an inflow port 44A, a first outlet 44B, a second outlet 44C, communication holes 45A, 45B, 45C, and a rectifying member 5. When the communication holes 45A, 45B, and 45C are not distinguished, they are referred to as communication holes 45.

The valve shaft 41 has a rod shape. The valve shaft 41 is arranged on a common shaft with the central shaft X of the can 2. The valve shaft 41 is arranged in the internal space of the valve body 4 so as to be movable in the axis X direction. One end of the valve shaft 41 is connected to a drive mechanism housed inside the can 2. The valve shaft 41 moves the valve body 42 in the axis X direction.

A valve chamber 43 connected to the communication hole 45A is provided in the internal space of the valve body 4. The valve chamber 43 is a space in which the valve body 42 is arranged. The valve chamber 43 has a first valve seat 431 and a second valve seat 432. The first valve seat 431 is arranged on the upper end surface of the valve chamber 43 in the axis X direction (upper surface on the can 2 side), and the second valve seat 432 is arranged on the lower end surface of the valve chamber 43 in the axis X direction. A communication hole 45B is communicated to the upper side of the first valve seat 431 in the axis X direction (can 2 side) via a straight portion 49b, and a communication hole 45B is communicated to the lower side of the second valve seat 432 in the axis X direction via a refraction portion 46b. The holes 45C are connected to each other. Therefore, the valve chamber 43 communicates with the communication hole 45B and the communication hole 45C.

The valve body 42 is press-fitted into the outer circumference of the valve shaft 41 and fixed. That is, the valve body 42 moves upward or downward in the axis X direction together with the valve shaft 41. By moving the valve body 42 upward or downward in the axis X direction, the valve body 42 comes into contact with and separates from the first valve seat 431 and the second valve seat 432. When the valve body 42 is seated in the first valve seat 431, the communication hole 45B is blocked and the fluid flows into the communication hole 45C. On the other hand, when the valve body 42 is seated on the second valve seat 432, the communication hole 45C is blocked and the fluid flows into the communication hole 45B.

An inflow port 44A is provided on the side surface of the valve body 4. The inflow port 44A is an opening through which a fluid flows into the valve body 4. One end of the communication hole 45A is the inflow port 44A, and the other end is connected to the valve chamber 43. The valve chamber 43 and the inflow port 44A communicate with each other through the communication hole 45A. That is, the fluid flowing in from the inflow port 44A flows into the valve chamber 43 through the communication hole 45A.

The first outlet 44B and the second outlet 44C are openings through which the fluid flows out. The first outlet 44B and the second outlet 44C are provided side by side in the axis X direction with the axis of the opening directed to the side surface of the valve body 4 in the direction perpendicular to the axis X. One end of the communication hole 45B is a first outlet 44B. The portion (straight line portion 49a) of the communication hole 45B connected to the first inflow port 44B extends from the first outflow port 44B toward the valve shaft 41 at right angles to the axis X direction. The other end of the communication hole 45B is a valve seat 431. The portion (straight line portion 49b) of the communication hole 45B connected to the valve chamber 43 is arranged so that the center line is a common axis with the axis X. A refracting portion 46a is formed at the intersection of the straight line portion 49a and the straight line portion 49b. That is, the communication hole 45B has straight portions 49a and 49b extending on a straight line, and the two straight portions 49a and 49b are connected by a refracting portion 46a formed inside the valve body 4. As will be described later, the refracting portion 46a is provided with a rectifying member 5 having a passage 53 through which the refrigerant flows. A tubular tubular sheet 61 forming a straight line portion 49b is arranged on the valve chamber 43 side of the rectifying member 5.

One end of the communication hole 45C is a second outlet 44C. The portion of the communication hole 45C at the second inflow port 44C extends from the second outflow port 44C toward the valve shaft 41 at right angles to the axis X direction. The other end of the communication hole 45C is a valve seat 432. The portion of the communication hole 45C on the valve chamber 43 side is configured so that the center line is a common axis with the axis X. A refracting portion 46b is formed at a portion where the straight portions on both sides of the communication hole 45C intersect. That is, the second outlet 44C and the valve chamber 43 communicate with each other through the communication hole 45C.

The rectifying member 5 is a member arranged in a portion where the direction of the flow direction of the straight portion changes. In the present embodiment, the rectifying member 5 is arranged in the refracting portion 46a of the communication hole 45B and has a passage 53 connecting the straight portion 49a and the straight portion 49b. As the material of the rectifying member 5, metal or resin can be used. In this embodiment, polyphenylene sulfide resin (PPS) is used as the material of the rectifying member 5. By using PPS as the material of the rectifying member 5, it is easy to process and the productivity is improved, and the weight of the valve device 1 can be reduced.

The rectifying member 5 is arranged between the cylindrical sheet 61 and the screw 62. The tubular sheet 61 is inserted through the opening on the upper surface of the valve body 4 on the end surface that is fixed to the can 2, then the rectifying member 5 is inserted, and finally the screw 62 is fastened to the opening on the upper surface of the valve body 4. The rectifying member 5 is fixed in the refracting portion 46a by being sandwiched between the screw 62 and the cylindrical sheet 61. In other words, the rectifying member 5 functions as a retaining member for the tubular sheet 61, and the screw 62 functions as a retaining member for the rectifying member 5.

The tubular sheet 61 is a substantially cylindrical member having a valve seat 431 formed at the lower end portion and a flange portion 61a formed at the upper end portion. The lower surface of the flange portion 61a is in contact with the valve body 4 via the seal member 61b to be locked, and the upper surface of the flange portion 61a is in contact with the rectifying member 5. A sealing member 61b such as an O-ring prevents fluid that does not pass through the valve seat 431 from flowing to the first outlet 44B side. Inside the tubular seat 61, a straight portion 49b that connects the passage 53 of the rectifying member 5 and the valve chamber 43 is formed. The valve seat 431 may be formed on the valve body 4 by cutting, and the tubular sheet 61 may not be used.

FIG. 3A is a perspective view of the rectifying member 5, and FIG. 3B is a cross-sectional view of the rectifying member 5. As shown in FIG. 3A, the rectifying member 5 has a cylindrical shape in which a portion corresponding to the straight line portion 49a is cut out. The central axis of the rectifying member 5 is arranged in the refracting portion 46a so as to be a common axis with the axis X. A passage 53 through which a fluid flows is formed on the inner peripheral surface of the rectifying member 5. A flow path through which the fluid flows is formed by the straight portions 49a and 49b of the communication hole 45B and the passage 53 of the rectifying member 5. As shown in FIG. 3B, the rectifying member 5 includes a corner portion 52 composed of an inner peripheral surface that is refracted or curved larger than the angle of the refracting portion 46, and a linear inner peripheral surface (non-curved inner peripheral surface). It has a non-curved portion 54 made of. That is, the outer peripheral surface of the passage 53 of the rectifying member is formed by the corner portion 52 and the non-curved portion 54. The angle of the refracting portion referred to here refers to an angle formed by the center lines of the communication holes forming the refracting portion. For example, the angle of the refracting portion 46a of the communication hole 45B is a right angle (90 degrees) because it is an angle formed by the center line of the straight line portion 49b extending parallel to the axis X direction and the center line of the straight line portion 49a extending perpendicular to the axis X direction. ). The rectifying member 5 of the present embodiment has non-curved portions 54 on both sides (both sides in the flow direction) of the corner portions 52, but the non-curved portions 54 are formed on one of the upstream side and the downstream side. Alternatively, the dimensions of the corner portion 52 and the dimensions of the passage 53 may be set so that the non-curved portion 54 is not formed in any of them.

As shown in FIG. 1, the inner peripheral surface 52a of the corner portion 52 is curved or refracted larger than the angle formed by the wall surface of the inner peripheral surface of the refracting portion 46a. The fact that the inner peripheral surface of the corner portion is curved more than the inner peripheral surface of the refracting portion means that the flow of the internal space of the refracting portion in the shape of the cross section along the central axis of the flow path (cross section shown in FIG. 1). It means that the radius of curvature of the inner peripheral surface of the corner portion of the rectifying member 5 is larger than the inner peripheral surface forming the corners of the two surfaces along the direction. Further, when the inner peripheral surface of the rectifying member 5 is refracted larger than the angle of the inner peripheral surface of the refracting portion, the radius of curvature of the center line of the corner portion of the rectifying member 5 is larger than the refracting angle of the refracting portion. Point to that.

In the present embodiment, as shown in FIG. 3B, the center line of the passage 53 of the rectifying member 5 (reference numeral A in FIG. 3B) is the internal space at the position where the flow path changes the flow direction. The radius of curvature is larger than the center line in the flow direction (reference numeral B in FIG. 3B). That is, in the present embodiment, the inner peripheral surface 52a of the corner portion 52 of the rectifying member 5 has a shape in which the cross section along the center line of the axis X and the straight portion 49a is gently rounded without any corners. There is. In the present embodiment, the angle at which the center line in the flow direction of the internal space of the refracting portion 46a (reference numeral B in FIG. 3B) is refracted is 90 degrees, and the center of the straight portion 49b and the straight portion 49a. It is the same as the angle formed by the line. Further, the inner peripheral surface 52a of the corner portion 52 has a smooth shape without unevenness. No unevenness means that there is no step.

In the present embodiment, the rectifying member 5 is provided only in the refracting portion 46a of the communication hole 45B, but may be provided in the refracting portion 46b of the communication hole 45C. That is, the rectifying member 5 may be provided only in a part of the refracting portions (46a or 46b) of the communication hole 45, or may be provided in all the refracting portions (46a and 46b).

Next, the action will be described. When the valve body 42 is seated in the second valve seat 432, the fluid flowing into the valve chamber 43 from the communication hole 45A flows into the communication hole 45B.

In the present embodiment, the rectifying member 5 having the passage 53 through which the fluid flows is provided, and the rectifying member 5 is arranged in the refracting portion 46a of the communication hole 45B. That is, the fluid flows through the passage 53 of the rectifying member 5 instead of the refracting portion 46 of the communication hole 45B. The passage 53 of the rectifying member 5 has an inner peripheral surface 52a (inner peripheral surface 52a of the corner portion 52) having a radius of curvature larger than the angle of the wall surface of the refracting portion 46a. Therefore, the fluid can flow more smoothly than passing through the refracting portion 46a having no rectifying member 5, and the pressure loss can be reduced.

Further, if the wall surface of the refrigerant passage (flow path) is uneven, that is, if there is a step, the fluid may swirl due to the step, leading to pressure loss. In the present embodiment, the passage 53 of the rectifying member 5 has a smooth shape without unevenness. Therefore, it is possible to prevent the fluid flowing through the passage 53 of the rectifying member 5 from swirling and the like, and it is possible to reduce the pressure loss.

(effect)
The valve device 1 of the present embodiment has a valve chamber 43 in which the valve body 42 is arranged, an inflow outlet 44, and a valve body 4 having a communication hole 45 for communicating the valve chamber 43 and the inflow outlet 44, and in the communication hole 45. The rectifying member 5 provided is provided. The communication hole 45 has a refracting portion 46a in which the center line of the communication hole 45 is refracted, and the rectifying member 5 is arranged in the refracting portion 46a and has an inner peripheral surface 52a that is refracted or curved larger than the angle of the refracting portion 46a. It has a corner portion 52 comprising.

As a result, the fluid flows through the passage 53 of the rectifying member 5 instead of the refracting portion 46a of the communication hole 45. Since the passage 53 of the rectifying member 5 has a smooth shape without unevenness, the fluid flows smoothly in the passage 53 of the rectifying member 5. Therefore, the pressure loss can be reduced.

In particular, the refracting portion 46a of the communication hole 45 is refracted at a right angle (the angle of refraction is 90 degrees). Even in such a case, since the corner portion 52 of the rectifying member 5 of the present embodiment has a radius of curvature larger than the corner portion of the refracting portion 46, the fluid flows through the refracting portion 46a as compared with the case where the fluid flows through the refracting portion 46a. , Can flow smoothly. Therefore, the pressure loss can be reduced.

(Second Embodiment)
The valve device according to the second embodiment will be described with reference to the drawings. The same configurations and the same functions as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 4 is a front sectional view of the valve device according to the second embodiment. As shown in FIG. 4, the valve device according to the second embodiment has different shapes of the communication holes 45B and 45C from those of the first embodiment. The shape of the communication hole 45A is the same as that of the first embodiment.

The first outlet 44D and the second outlet 44E are arranged on the end surface opposite to the end surface on which the valve body 4 is fixed to the can 2. The first outlet 44D and the second outlet 44E are arranged so as to sandwich the shaft X.

The communication hole 45D has straight portions 49c and 49d. The straight portion 49c extends from the first outlet 44D in parallel with the axis X direction and does not reach the end surface of the valve body 4 on the opposite side of the first outlet 44D. The straight line portion 49d extends in a straight line in a direction orthogonal to the axis X. One end of the straight portion 49d is connected to the end of the straight portion 49c. The other end of the straight portion 49d is an opening of the valve body 4, and as will be described later, this opening is sealed by a plug 63. Further, the straight portion 49d is connected to the straight portion 49b formed inside the tubular sheet 61. In this way, the first outlet 44D communicates with the valve chamber 43 via the straight portion 49c, the straight portion 49d, and the straight portion 49b.

The communication hole 45E has straight portions 49e, 49f, 49g. The straight portion 49e extends parallel to the axis X direction from the second outlet 44E. The straight line portion 49f is arranged so that the center line is a common axis with the axis X. One end of the straight portion 49f is connected to the valve chamber 43. The straight portion 49g extends in a direction orthogonal to the axis X and intersects the straight portion 49e and the straight portion 49f. A refracting portion 46c is formed at a portion where the straight portion 49g and the straight portion 49e intersect. Further, a refracting portion 46d is formed at a portion where the straight portion 49g and the straight portion 49f intersect. That is, two refracting portions 46c and 46d are formed in the communication hole 45E.

The refracting portion 46c and the refracting portion 46d are continuously provided at close positions. The close position means, for example, a range of about twice or less the diameter of the communication hole 45C. The communication hole 45C has a substantially crank-like shape due to the two refracting portions 46. The crank shape is a shape in which one of the two L-shapes is inverted so as to be point-symmetrical and the short side ends of the L-shape are joined together.

Two plugs 63 and 64 are provided on the side surface of the valve body 4. The plug 63 is a member that closes the opening formed when the valve body 4 is cut to form the straight portion 49d, and the plug 64 is a member that closes the opening formed when the straight portion 49g is formed. .. The plugs 63 and 64 are inserted into the respective openings. Therefore, the opening is closed by the plugs 63 and 64, and the fluid is prevented from flowing out from the opening.

The rectifying member 5 is provided over two refracting portions 46c and 46d formed in the communication hole 45E. The term "over the two refracting portions 46" means that the rectifying member 5 is arranged so that the fluid does not flow through the two refracting portions 46.

FIG. 5 is a schematic view of the fluid flowing in the rectifying member of the second embodiment. As shown in FIG. 5, in order to connect the straight line portions 49f and the straight line portions 49e located above and below the axis X direction, the rectifying member 5 is formed with a passage 53 notched diagonally with respect to the axis X. Has been done. Therefore, the fluid flows as shown by the arrow in FIG. That is, the fluid flowing through the straight line portion 49f flows in the passage 53 of the rectifying member 5 instead of the refracting portions 46c and 46d refracted at right angles to the crank shape. Then, it is refracted at an angle larger than a right angle by the passage 53 cut out diagonally with respect to the axis X. In the present embodiment, the passage 53 is formed so that the angle θ shown in FIG. 5 is approximately 135 degrees.

Specifically, when the fluid flowing from the valve chamber 43 through the straight portion 49f flows into the passage 53 of the rectifying member 5, it is refracted by approximately 135 degrees larger than the refracting portion 46d and flows into the passage 53. Then, when the fluid flowing through the passage 53 of the rectifying member 5 flows out from the passage 53, it is refracted by approximately 135 degrees larger than the refracting portion 46c and flows into the straight portion 49e. In this way, the rectifying member 5 refracts the fluid at an angle larger than the angles of the two refracting portions 46c and 46d, respectively.

6A and 6B are a perspective view of the rectifying member, a plan view (viewed from above), a bottom view, and a left side view of the rectifying member (from the axis Y direction plug 64 side shown in FIG. 4). (View), (e) right side view. The rectifying member 5 has a structure separate from that of the valve body 4. As shown in FIGS. 6 (d) and 6 (e), the rectifying member 5 has a circular shape when viewed from the axis Y direction. The rectifying member 5 has a fitting portion 51 into which the detent member 47, which will be described later, is fitted.

FIG. 7 is a perspective view (a) and a cross-sectional view (b) of the detent member 47. The detent member 47 is a member that fixes the rectifying member 5 so that it does not rotate (rotation with the axis Y as the axis). The detent member 47 has a substantially cylindrical shape. More specifically, the detent member 47 has a guide hole 47a, a large diameter portion 47b and a small diameter portion 47c. The valve shaft 41 is slidably inserted into the guide hole 47a. The large diameter portion 47b has a larger outer diameter than the small diameter portion 47c and is fitted into the fitting portion 51. The small diameter portion 47c is inserted into the recess 48 of the valve body 4.

When assembling the rectifying member 5 to the refracting portions 46c and 46d, the rectifying member 5 is inserted from the opening on the side surface of the valve body 4 (the opening closed by the plug 64) toward the refracting portions 46c and 46d. After inserting the rectifying member 5, the detent member 47 fits the large-diameter portion 47b into the fitting portion 51 of the rectifying member 5, and press-fits the small-diameter portion 47c into the recess 48 of the valve body 4. As a result, the rectifying member 5 is fixed so as not to rotate (rotation with the axis Y as the axis).

Further, the lower side of the valve shaft 41 is slidably inserted into the guide hole 47a formed in the detent member 47. That is, the valve shaft 41 is guided by the inner peripheral surface of the guide hole 47a of the detent member 47 and moves up and down. Further, in the present embodiment, the plug 64 closes the opening while being pressed against the rectifying member 5. In other words, the rectifying member 5 is also fixed by the plug 64. Therefore, the rectifying member 5 is more firmly fixed so as not to vibrate in the axis X direction or the axis Y direction. However, a structure may be adopted in which the rectifying member 5 is fixed only by the detent member 47 and the plug 64 is not pressed against the rectifying member 5.

As described above, in the valve device 1 of the present embodiment, the communication hole 45E has two refracting portions 46c and 46d, and the two refracting portions 46c and 46d are continuously provided at close positions and are rectifying members. 5 is arranged over the two refracting portions 46c and 46d. As a result, the pressure loss in the two refracting portions 46c and 46d can be reduced by one rectifying member 5, and the pressure loss can be efficiently reduced.

The valve body 4 has a recess 48, and the rectifying member 5 has a fitting portion 51, and further includes a detent member 47 that is fitted into the fitting portion 51 and is inserted into the recess 48. As a result, the rectifying member 5 can be fixed so that the rectifying member 5 does not rotate by fitting the detent member 47 to the fitting portion 51. Therefore, the rectifying member 5 can be easily fixed, and the productivity of the valve device 1 is improved.

In the present embodiment, the rectifying member 5 is not provided in the two refracting portions formed in the communication hole 45D, but the rectifying member 5 may also be provided in the refracting portion of the communication hole 45D. By providing the rectifying member 5, the pressure loss can be reduced even in the communication hole 45D.

Further, in the present embodiment, one rectifying member 5 is provided over the two refracting portions 46c and 46d of the communication hole 45E, but the two rectifying members 5 are provided and one is provided for each of the refracting portions 46c and 46d. The rectifying member 5 may be provided one by one.

(Third Embodiment)
The valve device 1 according to the third embodiment will be described with reference to the drawings. FIG. 8 is a front sectional view of the valve device according to the third embodiment. As shown in FIG. 8, the present embodiment is different from the second embodiment in that the pipe 7 and the joint mounting portion 8 are provided.

The pipe 7 is a pipe through which a fluid flows. The pipe 7 is made of a metal member. The pipe 7 is preferably made of the same member as the valve body 4. In this embodiment, it is made of an aluminum alloy which is the same material as the valve body 4. The inner peripheral surface of the pipe 7 has a smooth shape with no unevenness. The pipe 7 is provided outside the valve body 4. One end of the pipe 7 is connected to the valve body 4 by brazing. Specifically, one end of the pipe 7 is connected to the valve body 4 so that the opening of the pipe 7 overlaps with the first outlet 44F provided in the valve body 4.

The pipe 7 connected to the first outlet 44F extends in a direction orthogonal to the axis X, curves at an acute angle, and extends slightly obliquely toward the joint mounting portion 8. In other words, the pipe 7 is not refracted. As described above, the pipe 7 has a substantially L-shaped right-angled portion that is curved in a round shape. In the present embodiment, the pipe 7 is slanted and extends toward the joint mounting portion 8, but it may not be slanted and may extend parallel to the shaft X.

The joint mounting portion 8 is separate from the valve body 4. The bottom surface of the joint mounting portion 8 (the end surface on the opposite side connected to the pipe 7) is arranged so as to be flush with the bottom surface of the valve body 4 (the end surface on the opposite side where the valve body 4 faces the can 2). .. The joint mounting portion 8 has an opening through which a fluid flows. The pipe 7 and the joint mounting portion 8 are connected by brazing so that this opening and the opening at the other end of the pipe 7 overlap. In this way, the communication hole 45F and the joint mounting portion 8 communicate with each other via the pipe 7. Further, the joint mounting portion 8 is fixed to the valve body 4 by brazing. The means for fixing the joint mounting portion 8 to the valve body 4 is not limited to this, and various means such as fixing by welding and fastening with bolts can be used.

As described above, the valve device 1 of the present embodiment further includes a pipe 7 which is provided outside the valve body 4 and has a curved shape, and the pipe 7 communicates with the communication hole 45F. As a result, the size of the block-shaped valve body 4 can be reduced, so that the weight of the valve device 1 can be reduced. Further, since the pipe 7 has a curved shape, it is possible to reduce the pressure loss of the fluid flowing inside the pipe 7.

Further, by forming the flow path by the pipe 7, the portion of the valve body 4 that needs to be cut can be reduced, so that the time for cutting the valve body 4 can be shortened. Then, in parallel with the cutting work of the valve body 4, the processing work of the pipe 7 and the connection work of the pipe 7 and the joint mounting portion 8 can be performed, so that the productivity of the valve device 1 is improved. Furthermore, by reducing the number of parts to be cut in the valve body 4, the number of openings formed in the valve body 4 can be reduced, and the number of plugs that close the openings can also be reduced, thus reducing the number of parts and costs. be able to.

The pipe 7 is brazed to the valve body 4 and the joint mounting portion 8 and is connected to each of them. As a result, the pipe 7 can be connected to the valve body 4 and the joint mounting portion 8 by setting the brazing material at a desired location and heating it, so that the connection work of the pipe 7 can be simplified. The productivity of the valve device 1 is improved.

A joint mounting portion 8 that is separate from the valve body 4 is further provided, and the pipe 7 is connected to the joint mounting portion 8 on the side opposite to the end portion connected to the valve body 4, and the joint mounting portion 8 is the valve body 4. It is fixed to. The flow of the fluid causes vibration in the valve device 1. However, by fixing the joint mounting portion 8 to the valve body 4, the vibration generated in the pipe 7 can be alleviated. Therefore, it is possible to prevent the joint portion between the pipe 7, the valve body 4, and the joint mounting portion 8 from deteriorating due to vibration, and the durability of the valve device 1 is improved.

The material of the pipe 7 and the material of the valve body 4 are the same. By using the same material for the pipe 7 and the valve body 4 in this way, it is possible to prevent corrosion due to the potential difference between the members, and it is possible to obtain a valve device 1 with improved durability.

In the present embodiment, the pipe 7, the valve body 4, and the joint mounting portion 8 are joined by brazing, but the present invention is not limited to this, and the pipe 7 may be joined by a seal member. Further, although the pipe 7 has a substantially L-shaped shape, the shape of the pipe 7 may be a curved shape, for example, an S-shaped shape or the like.

(Other embodiments)
Although the embodiment according to the present invention has been described in the present specification, this embodiment is presented as an example and is not intended to limit the scope of the invention. The above-described embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. The embodiments and modifications thereof are included in the scope and the gist of the invention as well as the invention described in the claims and the equivalent scope thereof.

In the present embodiment, the valve device 1 of the three-way valve is used, but the present invention is not limited to this, and as long as the communication hole 45 is refracted, even if it is a two-way valve, it is a four-way valve or more. There may be.

In the first embodiment, the rectifying member 5 is fixed by the cylindrical sheet 61 and the screw 62, but as in the second embodiment, the rectifying member 5 is fixed by being fitted into the detent member 47. May be good. Further, in the present embodiment, the detent member 47 has a structure separate from that of the valve body 4, but the present invention is not limited to this, and the valve body 4 is cut to form the detent member 47 to form the valve body 4. It may be integrally configured. In this case, the rectifying member 5 is inserted through the opening closed in the plug 64, the fitting portion 51 of the rectifying member 5 is fitted into the large diameter portion 47b of the detent member 47, and then the valve shaft 41 is inserted into the guide hole 47a. You may.

In the second embodiment, the passage 53 of the rectifying member 5 has a refracted shape notched obliquely with respect to the axis X, but as shown in FIG. 9, the passage 53 has a shape with respect to the two refracted portions 46. Each corner portion 52 may have a curved shape.

1 Valve device 2 Can 3 Stator member 4 Valve body 41 Valve shaft 42 Valve body 43 Valve chamber 431 First valve seat 432 Second valve seat 44A Inlet 44B, 44D, 44F First outlet 44C, 44E Second Outlets 45, 45A, 45B, 45C, 45D, 45E, 45F Communication holes 46, 46a, 46b, 46c, 46d Refracting part 47 Anti-rotation member 47a Guide hole 47b Large diameter part 47c Small diameter part 48 Recessions 49a, 49b, 49c , 49d, 49e, 49f, 49g Straight part 5 Rectifying member 51 Fitting part 52 Square part 52a Inner peripheral surface 53 Passage 54 Non-curved part 61 Cylindrical sheet 61a Flange part 61b Sealing member 62 Screw 63, 64 Plug 7 Pipe 8 Joint Mounting part

In order to solve the above problems, the valve device of the present invention has a valve chamber in which a valve body is arranged, an inflow port, a valve body having a communication hole for communicating the valve chamber and the inflow outlet, and a valve body having a communication hole in the communication hole. The communication hole includes an arranged rectifying member, and the communication hole has a refracting portion in which the center line of the communication hole is refracted. have a corner portion consisting of an inner peripheral surface having an increased refraction or bending, the bent portion is provided at least two, two of the refractive elements are arranged in succession, wherein the rectifying member comprises two of said refracting portion Rukoto, are arranged over and said.

The refracting portion may have a refracting angle of 90 degrees . Before Kiben body has a recess, the rectifying member includes a fitting portion with fitted into the fitting portion may further comprise a detent member which is inserted into the recess.

Claims (8)

A valve chamber in which the valve body is arranged, an inflow port, a valve body having a communication hole for communicating the valve chamber and the inflow outlet, and a valve body.
The rectifying member arranged in the communication hole and
With
The communication hole has a refracting portion in which the center line of the communication hole is refracted.
The rectifying member is arranged in the refracting portion and has a corner portion composed of an inner peripheral surface that is refracted or curved larger than the angle of the refracting portion.
A valve device characterized by. The refracting portion has a refracting angle of 90 degrees.
The valve device according to claim 1. At least two refracting portions are provided.
The two refractors are arranged consecutively and
The rectifying member is arranged over the two refracting portions.
The valve device according to claim 1 or 2. The valve body has a recess and
The rectifying member has a fitting portion and has a fitting portion.
Further provided with a detent member to be fitted into the fitting portion and inserted into the recess.
The valve device according to any one of claims 1 to 3. A pipe provided outside the valve body and having a curved shape is further provided.
The pipe communicates with the communication hole,
The valve device according to any one of claims 1 to 4. Further provided with a joint mounting portion that is separate from the valve body,
The pipe is connected to the joint mounting portion on the side opposite to the end portion connected to the valve body.
The joint mounting portion shall be fixed to the valve body.
The valve device according to claim 5. The pipe is brazed to the valve body and the joint mounting portion and is connected to each of them.
The valve device according to claim 6. The material of the pipe and the material of the valve body are the same.
The valve device according to any one of claims 5 to 7.

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